Railway-brake.



10.828,184. PATENTED'AUG. 7, 1906. s. BRITTON.

RAILWAY BRAKE.-

APPLIOATION FILED MAYS, 1906.

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PATBNTED AUG. 7, 190e.

A lill s. BRITTON.

RAILWAY BRAKE.

APPLICATION FILED MAYS 1906 mr Nunkrs ptrrns ca., WASHINGTON. D. c,

uivrrnn sirrnsA PATENT OFFICE.

SAMUEL BRITTVON, OF TWILIGHT, PENNSYLVANIA.

l RAILWAY-BRAKE.

To all whom, it may con/cern:

Be it known that I, SAMUEL BRITTON, a citizen of the United States of America, residing at Twilight, in the county of Washington and State of Pennsylvania, have invented certain new and useful Improvements in Railway-Brakes, of which the following is a specification, reference being had therein to the a'ccompanyingdrawings. v

This invention 'relates to brakes especially adapted for use with street-railway cars; andits object is to provide an effective brake mechanism whereby the motion of a car may be quickly arrested, particularly on heavy grades. l

The invention consists of a friction-brake carried by a car in combination with a continuous rack-bar and a toothed wheel arranged between the track-rails and a train of gearing, together with a sprocket-chain for revolving a brake-shaft and brake-wheel carried thereby.

The invention further consists in various combinations of elements and details of constructionywhich will be fully described hereinafter in connection with the accompanying drawings, which form a part of this specification, and particularly pointed out inthe aption of my improved brake mechanism in connection with a portion of a car frame or platform. Fig. 2 is a similar view, partly in section, showing the side opposite to that shown in Fig. 1. Fig. 3 is a top plan view of the mechanism detached from the car, a portion of the rack-bar being shown in horizontal section. Fig. 4 is a reverse or bottom plan view. Fig. 5 is a view, partly in elevation and partly in transverse vertical section, showing a car axle and wheel and the center trackways for the brake mechanism. Fig. 6 is a detail view of the friction-brake'device.

Fig. 7 is a detail sectional view of the frictionwheel shaft and mechanism carried thereon.

Fig. 8 is a detail sectional view of the vertical shaft carrying the toothed driving-wheel, guide-roller, and driving sprocket-wheel, and Fig. 9 is a detail perspective view of a section of the rack-bar with which the toothed driv- Specification of Letters Patent.

Application filed May 3, 1906. Serial No. 315,018.

PatentedY Aug. '7, 1906.

fixed a friction-disk 4, around which passes a friction-band 5, one end of said band being secured to the car-platform, as shown in Figs. 1 and 2, while its opposite end is secured to a stud 6, projecting from a lever 7. The lever is loosely fulcrumed upon the shaft 3 and extends upward through a slot 8 in the car-platform, and said lever is equipped With a pawl or dog 9, adapted to engage a segmental ratchet 10, secured vupon the platform.

The numeral 11 designates a bevel-gear mounted upon the shaft 3 and meshing with a horizontally-disposed bevel-gear 1 2, mounted upon a stud-journal 13, having bearing at its lower end in the lower arm 14 of a bifurcated frame 15 and at its upper end in a block 16, fixed to the shaft 3. The upper arm 17 of the frame 15 is keyed to the upper side of the block 16, as best shown in Fig. 7.

Above the bevel-gear 12 on the shaft or journal 13 is a sprocket-wheel 18, connected by a sprocket-chain 19 with a sprocket-wheel 20, fixed upon a vertical shaft 21, supported in bearings formed in the rear parallel arms 22 and 23 of the frame 15.

Between the rails of the car-track I employ a conduit consisting of two sections 24 and 25, Fig. 5. Each of these conduit-sections is provided with an outwardly-extending flange 26, through which spikes 27 are driven to secure the sections to the ties or road-bed.l The inner side of the section 24 is hollowed out to 'accommodate a toothed driving-Wheel 28, fixed upon the vertical shaft 21, and said conduitsection 24 is also formed with a continuous groove 29 to provide a trackway for a grooved guide-roller 30, mounted revolubly upon the lower end of the shaft 21. The inner face of the conduit-section 25 is hollowed out to overlap the drivingwheel 28, and its inner face is formed with continuous rack-teeth 31, which are engaged by the teeth of the driving-wheel 28.

In Fig. 5 are shown an axle 32, a car-wheel 33, and one rail 34 of a railway-track.

The operation of the mechanism constructed as thus described is as follows: toothed wheel 28 engages the teeth of the rack 25 and is thus revolved to revolve the shaft 21 and the sprocket-wheel 20, mounted thereon. The intermeshing bevel-gears 11 and 12 are revolved through the intermediacy of the sprocket-wheels 2O and 18and the chain 19. The shaft 3 and brake-wheel 4 are revolved through the bevel-gears.

IOO

The

IIO

the spirit of the invention.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. Car-brake mechanism comprising a trackway located between the rails of the cartrack, and consisting of a continuous rack bar, and a grooved guide-rail, in combination with a friction-disk supported below the car-platform, a bifurcated frame, a vertically-disposed shaft carried by said frame, a toothed wheel adapted to engage said rack, a train of gearing between said toothed Wheel and friction-disk, and an operating-lever and brake-band. y

2. In a car-brake mechanism, the combination with a continuousrack-bar located between the rails of the track, a toothed wheel engaging said rack, a frame supported below the car-platform and having bearings for the shaft of said toothed wheel, a train of gearing arranged below the careplatform and having a sprocket-chain connection with the shaft of the toothed wheel, a friction-disk adapted to be revolved by said gearing, a friction-band passing around said disk, and an operating-lever to which one end of said friction-band is secured.

3. In car-brake mechanism, a bifurcated frame supported below the car-platform, a vertical shaft supported in bearings in the rear end of said frame, a toothed wheel mounted on said shaft, and adapted to engage a rack-bar supported between the rails of the track, a vertical shaft supported in bearings at the forward end of the frame, a-horizontal shaft also supported in bearings of said frame, bevel-gearsl mounted on said shafts, a friction-disk mounted on said horizontal shaft, a brake-band, an operating-lever connected thereto, and a sprocket-chain connection between the shaft of the toothed wheel and the of the toothed wheel.

5. The combination with a car-platform, of brake mechanism carried thereby, a vertically-disposed shaft supported below the platform, a toothed wheel mounted on said shaft, a guide-roller on said shaft below the toothed wheel, and a trackway arranged centrallybetween the rails of the car-track and comprising a continuous rack-bar with which said toothed wheel engages, and an oppositely-.disposed grooved rail upon which said guide-roller travels.

6. The combination with a car-platform of brackets depending therefrom, a horizontal shaft supported by said brackets, a bevelgear mounted on said shaft, a friction-disk also supported on said shaft, a vertical shaft below said horizontal shaft carrying a bevelgear and a sprocket-pinion, a vertical shaft supported in rear of said horizontal shaft, a-

sprocket-wheel carried thereon, and means for revolving said rear vertical shaft by the movement of the car.

In testimony whereof I aiiix my signature in the presence of two witnesses.

SAMUEL BRITTON. I/Vitnesses J. A. MGLAIN, lCHAs. RADCLIFFE. 

